function showElement1() { const element1 = document.getElementById('tn1'); if (element1) { element1.style.display = 'block'; } } function showElement2() { const element2 = document.getElementById('tn2'); if (element2) { element2.style.display = 'block'; } } function showElement3() { const element3 = document.getElementById('tn3'); if (element3) { element3.style.display = 'block'; } }

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